NASA: Mars had massive, mile-deep ocean

A newly released study from NASA shows Mars had an ancient ocean that might have been as large as Earth's Arctic Ocean.

NASA: Mars had massive, mile-deep ocean

A newly released study from NASA shows Mars had an ancient ocean that might have been as large as Earth's Arctic Ocean.

01:03 - Source: NASA

Mars Exploration 15 videos

A newly released study from NASA shows Mars had an ancient ocean that might have been as large as Earth's Arctic Ocean.

NASA: Mars had massive, mile-deep ocean

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- Source: NASA

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STAR CITY, RUSSIA - MARCH 5: In this handout from National Aeronautics and Space Administration or NASA, Astronaut Scott Kelly is seen inside a Soyuz simulator at the Gagarin Cosmonaut Training Center (GCTC) March 5, 2015 in Star City, Russia.

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